Big Upset in PA - Tidal Wave?

There were several races Dems were expected to pick up in PA. Rep. Melissa Hart's (R-PA) suburban Pittsburgh seat wasn't one of them. It looks like she has been defeated by relative newcomer Jason Altmire. While Hart recently gave National Wildlife Federation an opportunnity to brief her on the attitudes of hunters and anglers in PA on global warming (they think its real and that we need to take action) her anti-conservation voting record was out of step with her district. Does this loss mean a Democratic tidal wave approaching the upper 30's or a 40 seat pick-up? Quite possibly.

Interestingly, though, in PA's 6th and 8th congressional districts the Murphy-Gerlach and Murphy Fitzpatrick races are too close to call at this point with 100% of the precincts in. These are moderate GOP incumbents (Fitzpatrick was one of the few threatened Republicans endorsed by Sierra Club).